<button class="button">Join now</button>

<style>
/* From Uiverse.io by roroland  - Tags: glassmorphism, pink, gradient, button, rounded, smooth, colorful */
.button {
  --radius: 20px;
  --col0: 0, 0, 0;
  --col1: 219, 161, 240;
  --col2: 239, 214, 248;
  --col3: 255, 255, 255;
  --col4: 270, 153, 138;
  --col5: 244, 164, 177;
  --col6: 244, 136, 136;
  --col7: 243, 136, 94;
  --col8: 252, 187, 165;
  --col9: 254, 230, 222;
  --col10: 247, 197, 161;
  --col11: 245, 205, 238;
  --col12: 252, 67, 130;
  position: relative;
  background: linear-gradient(
    65deg,
    rgba(var(--col1), 0.81) 0%,
    rgba(var(--col2), 0.81) 11%,
    rgba(var(--col3), 0.81) 21%,
    rgba(var(--col3), 0.81) 24%,
    rgba(var(--col4), 0.5) 37%,
    rgba(var(--col5), 0.81) 42%,
    rgba(var(--col6), 0.81) 50%,
    rgba(var(--col7), 0.9) 58%,
    rgba(var(--col8), 0.81) 68%,
    rgba(var(--col9), 0.81) 72%,
    rgba(var(--col3), 0.81) 78%,
    rgba(var(--col10), 0.81) 86%,
    rgba(var(--col11), 0.81) 93%,
    rgba(var(--col1), 0.81) 98%
  );
  background-size: 105%;
  box-shadow: -10px 10px 0px rgba(var(--col0), 0.005),
    0px 20px 30px rgba(var(--col0), 0.16),
    inset 5px 0 20px rgba(var(--col1), 0.5),
    inset -5px 20px 10px rgba(var(--col4), 0.5),
    inset 1px 3px 3px rgba(var(--col0), 0.25),
    inset 0px -5px 1px rgba(var(--col7), 0.5),
    inset 0px -5px 1px rgba(var(--col2), 0.95),
    inset 1px 2px 1px rgba(var(--col12), 0.15),
    inset 5px 5px 1px rgba(var(--col12), 0.35),
    inset -5px 5px 1px rgba(var(--col12), 0.15),
    inset 0px -20px 10px rgba(var(--col12), 0.15);
  cursor: pointer;
  padding: 1rem 2rem;
  min-height: 5rem;
  min-width: 16rem;
  font-size: 1rem;
  padding-inline-start: 10%;
  font-weight: 600;
  filter: hue-rotate(0deg);
  color: #505050;
  border-radius: var(--radius);
  appearance: none;
  border: 0;
  transition: all 3s ease-in-out;
  z-index: 0;
}
.button:hover {
  color: rgba(var(--col7), 1);
  text-shadow: 2px 2px 5px rgba(var(--col1), 0.75);
  background-size: 350%;
  filter: hue-rotate(125deg);
}
.button:active {
  transition: all 0.1s ease-out;
  scale: 0.95;
}

.button:hover::after {
  backdrop-filter: blur(1px);
  opacity: 0.25;
  box-shadow: 0;
  translate: 10%;
}
.button::before {
  --border: 4px;
  box-shadow: inset 0px 0px 20px rgba(var(--col1), 0.5),
    0px 0px 1px rgba(var(--col2), 0.95);
  content: "";
  border-radius: inherit;
  position: absolute;
  display: block;
  width: calc(90% - var(--border));
  height: calc(75% - var(--border));
  inset: 0.5rem 0.5rem 0.5rem;
  z-index: 0;
  border: var(--border) solid transparent;
  transition: all 3s ease-out;
}
.button::after {
  content: "";
  aspect-ratio: 1;
  clip-path: polygon(88% 0, 70% 45%, 100% 45%, 61% 100%, 72% 57%, 43% 57%);
  position: absolute;
  background: #505050;
  backdrop-filter: blur(5px);
  width: 10%;
  opacity: 1;
  inset: 33% 0 0 25%;
  z-index: -1;
  transition: all 1s ease-out;
}

</style>
    